fileInput = open('input.txt', 'r')
fileOutput = open('output.txt', 'w')

n = int(fileInput.readline())
secretDict = set(fileInput.readline().strip() for _ in range(n))
secretWord = fileInput.readline().strip()
playerSolution = secretWord[0]    # игрок знает первую букву загаданного слова

PLAYER, BOT = 0, 1
TURN = PLAYER
FAIL = False

for line in fileInput:
    if TURN == BOT:
        ans = line.split()
        if ans[0] == 'YES':
            pass
        elif ans[0] == 'NO':
            playerSolution = playerSolution[:-1]
            FAIL = True if ans[1] == 'o>-<' else False
    if TURN == PLAYER:
        playerSolution += line.strip()
    TURN = BOT if (TURN == PLAYER) else PLAYER

if not FAIL and len(playerSolution) == len(secretWord):
    fileOutput.write('WON\n' + set(i for i in secretDict if (sorted([s for s in playerSolution]) == sorted([s for s in i]))).pop() + '\n')
else:
    fileOutput.write('LOST\n')

fileInput.close()
fileOutput.close()